Which way, Metal Gear Solid?

Let's agree - Solid Snake is too old to play the main role of the hero and rescue the whole world. He threw a pipe. He decided to spend the remaining handful of days of life (can not remember the exact number) "as a man, not a snake". No one probably would not be so crazy to suddenly "discover" a way to rejuvenate the body the dying prematurely David, after all this...